System of control for electric motors.



No. 894,199. I PATENTED JULY 28, 1908.

' R. M GASTON.

SYSTEM OF CONTROL FOR ELECTRIC MOTQES.

APPLICATION FILED NOV. 29, 1907.

2 SHEETS-$113111 1.

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No. 994,199. PATENTED JULY 29, 1909.

R. M. GASTON. SYSTEM OF CONTROL FORBLEGT'RIG MOTORS.

APPLICATION FILED NOV. 29,1907. I v

' 2 SHEETS-SHEET -2.

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Ta Z5 whom 1 v n waWufih ilVOldS the extension. 01' L may cm'mer'n: Iitv knawn that 1, RM W i. GASTON, a citizen of the United bmtesi'ilflidiiig 9.2 Morgan Park, in the county of {hack and State oflili'ilsis, have invented, ceri aiin new and ugmful Im rovemenis inSystm'ns of CO1):- trgl for Ill-satiric Motors, 0 3" Whisfn (ha 0519ming is a speaification. y

My nz'vmltian as "w The mm 1210 0 011m I" Q" has :01- ns ubjem topmvix'ie l ke opm'a'bimi of such @Eectria maaiv mom xi i) the pesitionof :m i -stai m" 0' 1* mator'or by the posh-i011 0?? some other devic orof was minisl'n operated v by such metal 61 device.

In carrying out my invention curmnt is supphad t0 the electric HlOtOX',the epemtlon ofwhinh is t0 be controlled thmugh a circuit bmk orotbm:appmpria when #0 11251, :3 mot)? from i'ecciving 0 1* t means which A111prevent the ,m such circuit Ewing set @1111: L 0330mm Yth'fO'ufh hmmeter 2 operatwii i an a swi ined cio i, 0

amt of the motor 150x- ;omt news r3 to anal La a.

nachsmism 12*013. L Ln oxaamtiejn 0f 3 v1 iiionmi.

A wtiml e5: 3142 V631 1. to be isund. i

the driving meagls utilizeu on a for 'tha: purposa) 0f operming theanisirl and the baking meahmais two eactliie mstors are used in this cmtion, it is desirable that they shank be inte'flaslzed that 0226 camnotoperma until g adaptw it iiMstm'M-ng eml w" of m invention as appliad totwo motr's In one of these the closing of the auxiliary circuit is thecondition to operation of mats]? which it controls. In the oizhez'ava'anggmant, w 1;. ti auxiliau wiruuii i supnlied with c1111 '1? 3Qiz'cui't bra: may, effective to break the siruuit.

Katie? m by mum. 1g Hm maxi 0f the Law's? leads '09- '7 this W36? (1 'nesir iii maker, the usrvu. be n {W ed i0 :i'enmm 3* 0 mm onlv j the mom?bu closed.

abovsamntiomd and such may app 121s following iiiusty- M y {3,19, ammngwA the axycggnpanying drawings,

mat-in a mm a sham I wins l5, 2, 03" c011- wsml Q conductor 3 a, 0? 5mdinary type, amiss of re 1 out of the cir- Ls a circuib I? mw nar Y 01 fms 11:: pa

a 0;? a soiencid 9. The ,moved Eg /1 3st the f le-njring Cu Emm; 1 be551 "ommd to solenoid 9 either from mains i, 2 or from a separate sourceof supply. I have shown the solenoid as supplied from the same source asthe motor through a conductor 11 which makes contact with switch arm 7and conductors 1). and 13. in this auxiliary circuit is a switch D whichis opened and closed by operation of the other motor A. This switch orcircuit breaker maybe of any. desired form and maybe connected withmotor A through any desired form of mechanism adapted to open and closethe switch for predetermined periods during the operation of its motor.l have represented the switch conventionally as consisting of thestation ary contacts 14 and 15 and the movable contact 16 carried by therod 17 reciprocated by an eccentric 18 on the shaft of a wheel 19 drivenby a belt 20 from motor A".

If contact 7 be moved, in any manner, either automatically or by hand orotherwise, to its closing position and the circuit through motor Acompleted by means of starter B, the motor will receive current from themains. Unless, however the auxiliary circuit be closed by switch D, thecircuit breaker will not operate to close the motor circuit at thatpoint, the spring 10 holding movable contact 7 in its open position.Nith the auxiliary circuit closed, solenoid 9 will be energized so as tohold contact 7 in its closing position. In such case, the currentthrough the auxiliary circuit will be as follows: From main 1 overconductors 13 and i2 and through switch D to solenoid 9; from solenoid 9by conductor 1 to contact 7, and from contact 7 over conductor 3 to main'2.

it will be understood that the circuit breaker is represented somewhatconventionally and in simplified form. An ordinary type 05- trip coilcircuit breaker might be used in an actual installation, in which casethe electro-magnetic element of such' well known apparatus wouldcorrespond to the magnet and core here shown.

If it is desired that the operation of motor A should be conditioned bythe position of motor A, the latter will be provided with a switch Dwhich makes and breaks the circuit through a conductor 21 leading fromconductor 13 to the solenoid of a circuit breaker C, this solenoidhaving a conductor 22 which comes in contact with the movable contact ofthe circuit breaker C when said contact is in its closing position.makesand breaks the circuit through a conduotor 23 leading from the main2 to the motor A, starter B being interposed in this conductor. Aconductor 24 connects the other pole of the motor to the main 1.. Bythis arrangement the operation of the motors A, A is conditioned by theositions respectively of switches D, D, the atter being controlled intheir operations by motors A, A,

from magnets E,

Circuit breaker 0" ,rss

respectively. The circuit breakers may be set by hand or they maybe oiuch a charactor as to operate automatically so that one of the motorswillbe automatically started as soon as, but not before, the othermotor, or the apparatus controlled thereby, shall have reached itspredetermined position.

In Fig. 2 is shown a modified form of appa ratus, in which the motorcircuits are opened by the circuit breaker, or will be automatically soopened it closed at another point, when the corresponding auxiliarycircuits are supplied with current. 1 his arrangement is the same asthat of Fig. 1 except in the following respects: in place of circuitbreakers C, C, I provide the circuit breakers E, E" which are somewhatconventionally illustrated in this figure as consisting of magnets 25having cores 26 which operate to compress springs 27 when the magnetsare ener gized. In place of conductors 1i and 22, l. provide conductors23 and 29 which lead ll respectively to con ductors 3 and respectivelyat points between the circuit breakcrs and the motors. When current issupplied to either one oi the auxiliary circuits by the closing of itsmotorcontrolled. switch, the circuit breakers will 0 crate to break thecorresponding motor circuit, but provided only that such circuits beclosed at other places. lit follows, therefore, that the circuitbreakers may normally remain closed without being affected by operation,of the motor controlled switches unless the corresponding motor circuitsare closed at the wrong time at other points, for ex ample, by thestarters. In the latter event, the circuit breaker solenoids, whichreceive current only when their corresponding motor circuits are closed,will be energized to break these circuits.

I wish it to be understood that I do not de sire to limit myself to theparticular devices, constructions and arrangements here shown, asobvious modifications will occur to those skilled in the art which willbe clearly within the scope of my invention. For erzample, it might notbe necessary to actual y break the circuits. My invention contemplatesthe substitution for the circuit breakers 01". any de vice which wouldbe effective to prevent the flow of current through the circuits,whether by brbaking the circuits or not. I I

I have chosen two typical arrangements, but these arrangements mightbcmodified to a very considerable extent. For exampie, the motors and alsothe circuit breaker solenoids might be from separate sources. Forpurposes of clear illustration I have endeavored to em body my inventionin as simple forms of apparatus as possible.

I claim:

1. In combination, an electric motor, a main circuit for the same, anelectricall supplied with current starter is closed the circuit breaoperated controller to control the supply of current to the main circuitsaid controller being on an auxiliary circuit, a second. motor,

and means operated thereby which condition .other than the onecontrolled by said auxiliary circuit and the controller containedtherein. a

3. In combination, a motor, an electromagnetic circuit breaker on anauxiliary circuit, a second motor, and means made effective by and'atcertain periods in the o )eration of said second motor to open and losethe auxiliary circuit and'thereby set the circuit breaker in operation.

4. In combination, a motor, an electromagnetic circuit breaker for thesame, a

starting device in circuit with the motor and {circuit breaker, a secondmotor, and a switch in the auxiliary circuit opened and closed by and atcertain periods in the operation of said second motor, whereb when theher will be made effective to open the circuit of the first-namcd motor.

5. In combination, a pairiof motors, electro-magnetic circuit breakersfor each of said motors, auxiliary circuits for said circuit breakers,switches in said auxiliary circuits, and means made effective by and atcertain periods in the operation of each of the motors whereby thecircuit breaker for each motor is made operative to break its motorcircuit conditionalpu on the position of the switch operated by t eother motor.

6;In combination, a motor, an electromagnetic circuit breaker, anauxiliary circuit for the circuit breaker, a switch in said auxiliacircuit, a second motor, means made'e ective by and at certain periodsin thedperationof the second motor for opening and closing the auxiliarycircuit, said circuit'breaker being so connected with the motor that itmay remain inoperative regardless o fthe movements of said switch .saidauxilia motor circuit between the circuit breaker breaker normally inits c and will be made opcrativeby current con (litions in the motorcircuit. 1.

7. In combination, a motor, a circuit breaker having 'clcctro magneticmeans adapted to be energized to close the circuit, an auxiliary circuitfor the circuit breaker, circuit being connected to the and the motor, aswitch in said auxiliary circuit, a second motor, and means madeeffective by and at certain periods in the operation of said secondmotor for opening and closing said switch whereby the circuit breakermay be allowed to remain closed while the motor circuit is 0 on and willbecome opcrativeonly when t e motor circuit and the auxiliary circuitswitch are closed. i

8. In combination, an electric motor, an electro-magnetic device forpermitting or preventing the supply of current to the motor, said devicebeing on an auxiliary circuit,' a driven device, and means madeeffective at certain positions of said driven device to cause current tobe supplied to or shut off from said auxiliary circuit, whereby theoperation of said motor depends upon the o eration of the driven device.

9. n combination, an electric motor, a

main circuit therefor, a controller to control the su ply of current tosaid motor, said controller located in an auxiliary circuit, a secondmotor, and means operated thereby which condition the sup )ly of currentto said auxiliary circuit, saul controller for said main circuitconditioned also by the presence of current in the main circuit.

10. In combination, an electric motor, a

main circuit therefor, a circuit breaker to -interrupt said maincircuit, said circuit breaker being su plied from an auxiliary circuit,the second motor and means'operated thereby which con'ntion the supplyof current to the auxiliary 'ircuit, said circuit osed position and itsopening conditioned by the presence of current in the main circuit gRALPH M. GAS 170m. Witnesses:

PERCIVAL H. TRUMAN, H. L. Pncx.

